NAD T 175 Service Manual page 39

KEYBOARD
V D2 2 0 1
V F D-1 6 -B T-1 3 0 G IN K
+5 V _ K
R 2 2 0 4
3 3 k
R 2 2 1 1
2 .2 k
C 2 2 0 9
C 2 2 1 2
4 7 0 0 p N .I.
5 0 V
DG N D
+5 V _ K
DG N D
R 2 2 4 0
2 .2 k
E
Q 2 2 0 5
B
DTA 1 1 4 E K A
C
DG N D
+5 V _ K
R 2 2 4 1
2 .2 k
E
Q 2 2 0 6
B
DTA 1 1 4 E K A
C
DG N D
J2 0 0 2 B
To M C U J2 0 0 2 A
C 2 2 0 6
1 0 0 p
+3 9 V
C 2 2 1 0
0 .1 U
R 2 2 0 8 R 2 2 0 6
2 2 1 /4 W 2 2 1 /4 W
C 2 2 0 2
0 .1 U
DG N D
C
R 2 2 0 1
Q 2 2 0 1
B
2 S D1 9 1 8
1 k
E
R 2 2 0 2
+3 9 V
4 .7 k
R 2 2 0 3
2 .2 k
R 2 2 0 7
DG N D
1 0 k
DG N D
R 2 2 0 9 4 7 0
R 2 2 0 5
4 7 0
R 2 2 3 6
2 .2 k
D2 2 0 3 C 2 2 0 1
6 .2 V 0 .1 U
1 /2 W
+5 V _ K +3 9 V
DG N D
B L-B U B JF B 5 2 C 4 V -1
+5 V _ K +5 V _ K
R 2 2 3 0 R 2 2 3 1
1 0 k 1 0 k
M 2 2 0 1
E C 1 6 2 1 0 2 F 2 B -H A 1 -0 0 2
R 2 2 3 2 1 0 0
1 A
R 2 2 3 3 1 0 0
2 B
3 C
C 2 2 0 5 C 2 2 0 3 C 2 2 0 4
1 0 0 p 0 .1 U 0 .1 U
DG N D DG N D DG N D DG N D DG N D
+5 V _ K
U 2 2 0 1
H E F 4 0 9 4 B T
C 2 2 1 1
4 7 u
1 6 V 1 6 1
V DD S TR O B E
1 5 2
DG N D O /P_ E N A B LE DA TA
1 4 3
Q 5 C LO C K
R E D 1 3 4
Q 6 Q 1
O R A N G E 1 2 5
Q 7 Q 2
B LU E 1 1 6
Q 8 Q 3
1 0 7
Q S Q 4
9 8
Q S V S S
DG N D
R 2 2 3 5 R 2 2 3 4
2 .2 k 2 .2 k
+5 V _ K
Q 2 2 0 2 Q 2 2 0 3 Q 2 2 0 4
DTA 1 1 4 E K A DTA 1 1 4 E K A DTA 1 1 4 E K A
E E E
B B B
C C C
R 2 2 3 7 R 2 2 3 8 R 2 2 3 9
1 k 1 k 1 k
D2 2 0 1
DG N D
39
+5 V _ K
R 2 2 1 3 R 2 2 1 4 R 2 2 1 5 R 2 2 1 6
1 0 k 1 0 k 1 0 k 1 0 k
D2 2 0 5
LL4 1 4 8
1 2 1 2 1 2 1 2
S 2 2 0 1 S 2 2 0 2 S 2 2 0 3 S 2 2 0 4
D2 2 0 6
A M /F M /DB TU N E R M O DE IN F O M E M O R Y
LL4 1 4 8
1 2 1 2 1 2 1 2
S 2 2 0 5 S 2 2 0 6 S 2 2 0 7 S 2 2 0 8
D2 2 0 7
U P LE F T DO W N R IG H T
LL4 1 4 8
1 2 1 2
S 2 2 0 9 S 2 2 1 0
D2 2 0 8
PO W E R O N E N TE R
LL4 1 4 8
1 2 1 2 1 2 1 2
S 2 2 1 1 S 2 2 1 2 S 2 2 1 3 S 2 2 1 4
D2 2 0 9
S PK A S PK B S O U R C E U P S O U R C E DO W N
LL4 1 4 8
N .I. for T1 7 5
N .I. for T1 7 5
1 2 1 2 1 2 1 2
S 2 2 1 5 S 2 2 1 6 S 2 2 1 7 S 2 2 1 8
LIS TE N IN G M O DE TO N E C O N TR O LS TO N E DE F E A T F R O N T IN PU T/M P
+5 V _ K +5 V _ K
R 2 2 1 2 R 2 2 1 0
D2 2 0 2
1 0 k 1 0
F M -6 0 3 8 TM 2 -5 A N
D2 2 0 4
1 V O U T
2 G N D
LL4 1 4 8
3 V C C
C 2 2 0 8
C 2 2 0 7
1 u
0 .1 U 5 0 V
DG N D DG N D DG N D